Permutation-lock



(No Model.)

C. P. CHASE.

PERMUTATION LGGK. I

Izi f.

Patented Mar. 1,1898.

waiesses. I

UNITED STATES 'ATENT OFFICE.

I OORNWELL P. CHASE, OFMINNEAPOLIS, MINNESOTA:

PERM UTATION-LOCK.

SPECIFICATION forming part of Letters Patent No. 599,765, dated March 1,1898.

Application filed S t mb r 13, 1897. Serial No. 651,402. (No model.)

- To all whom it may concern.-

Be it known that I, OoRNwELL P. CHASE, a citizen of the United States,residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented certain new and useful Improvements inPermutation-Locks and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention'has for its especial object to provide an improved andsimple permutation or keyless padlock adapted for use in lookingbicycles and for numerous other purposes. My inventionis, however,capable of more general application wherever a permutation-lock isdesirable;

To the ends above noted my invention consists of the novel devices andcombinations of devices hereinafter described, and defined in theclaims.

Several'forms of my invention are illustrated in theaccompanying-drawings, wherein, like numerals indicating like partsthroughout the several views- Figure 1 is a plan view of the preferredform of my invention shown as in the form of a padlock. Fig. 2 is asimilar view to Fig. 1, but with the lock case or block shown inhorizontal section. Fig. 3 is an end elevation of the lock shown inFigs. 1 and 2. Fig. 4 is a transverse section taken on the line 00 0: ofFig. 2. Fig. 5 is a perspective view of one of the rotary detentsremoved from the lock.

Fig. 6 is a plan View of a modified form of the padlock, and Fig. 7 isanother modification of the lock shown as designed for use as a door orchest lock.

Referring first to the construction illustrated in Figs. 1 to 5,inclusive, 1 indicates a metallic block, which is preferably rectangularin form and, together with the top plate 2 and the bottom plate 3,constitutes the lockcase. The said plates 2 and 3 maybe secured to theblock 1 by means of rivets, screws, or otherwise.

The block 1 is provided with a bolt seat or passage 4, whichextendslongitudinally through the same, and also with a series of verticalseats 5, in which rotary detents 6 are mounted. As shown, there are sixdetents 6,

able him to unlock the lock.

which extend upward through-the top plate I 2 and are provided withsquare heads or nuts 9, which are rigidly secured thereto byscrewthreaded engagement or otherwise. These heads or nuts 9 are markedon their different edges with different characters or indicia. As shown,this is accomplished by providing the edges thereof with difierentnumbers of notches. The number and arrangement of these notches ormarkings is arbitrary; but they must bear some predetermined relation tothe relative positions of the notches 7 of the particular detents 6 withwhich they 00- operate, and this particular relation must of course beknown to a person in order to en- The bolt 10, which in thisconstruction is cylindrical, fits into the seat 4 and is provided withthree annular grooves 11, which when the bolt is positioned for lockingstand one opposite each laterally-spaced pair of detents 6. To one endof the bolt 10 is pivoted one end of a shackle in the form of a U-shapedstaple 12. The freeends of the staple 12 and bolt 10 are splitlongitudinally or formed with half-cylindrical sections 13, whichoverlap each other and are held against endwise movement goyinterlocking engagement. (Shown 0 at 14.

When the bolt 10 is in a position to be locked, the overlapping sections13 are drawn into the bolt-seat 4, and hence the bolt 10 and staple 12are locked together.

As is evident, whenever any one or more of the rotary detents 6 isturned fromthe position indicated in Fig. 2 the body of said detent ordetents will be turned into the notch or notches 11 and hold said bolt10 against I00 the left far enough to throw the section 13 of the staple12 out of the seat 4. After this has been accomplished the staple 12 maybe opened up by pivotal movement and the bolt 10 may be withdrawn fromits seat 4, if desired.

To set the detents in their unlocking positions, the operator must ofcourse know the combination. The combination for which the lock abovedescribed is set is, for the upper row, blank, 3, 4, and for the lowerrow 1, 3, 2. By substituting or interchanging the detents thecombination may of course be varied at will.

The lock illustrated in Fig. 6 may be identical with that abovedescribed except that a chain or shackle 14 is substituted for thestaple 12. This chain 14 is secured at one end to the projecting end ofthe locking-bolt 10 and at its other end to a lug 15, formed as anextension of the top plate 2.

In the door or chest lock (illustrated in Fig. 7) the locking-bolt 10 isprovided with a finger-piece or stud 16, which works through a slot 17in the block or case-section 1, and said block 1 is shown as providedwith laterallyprojecting flanges 18, by means of which it may be securedto a door or chest. Otherwise than as noted the construction shown inFig. 7 is substantially the same as that shown in Figs. 1 to 5,inclusive.

The advantages of a lock or looks such as above described are thought tobe obvious. They do not of course require the use of a key and have noparts which may be lost. They may be readily opened by a person knowingthe combination either in the daytime or at night, inasmuch as thenotches cut in the edges of the heads 9 may be felt as well as seen. Thelock is very simple in construction, strong and durable, and of smallcost, and it will be found practically impossible to open the lookwithout knowing the combination.

It will be understood, of course, that various alterations in thedetails of construction other than those above set forth may be madewithin the scope of my invention.

What I claim, and desire to secure by Letters Patent of the UnitedStates, is as follows:

1. In a lock, the combination with the block 1 with bolt-seat 4, of theseries of rotary detent-s 6 with notches 7, the cylindrical bolt 10 withannular notches or grooves 11, and devices for indicating to the personsknowing the combination, the unlocking positions of said detents,substantially as described.

2. In a lock, the combination with the block 1 with bolt-seat 4, of theseries of rotary detents 6 with notches 7, the bolt 10 with notches orgrooves 11, and the staple 12 pivoted at one end to said bolt 10 anddetachably connected to the other end thereof by means of thehalf-cylindrical sections 13 and interlocking joint 14, substantially asdescribed.

In testimony whereof I afiix my signature in presence of two witnesses.

CORNWELL P. CHASE.

Witnesses:

LILLIAN O. ELMORE, F. D. MERcHANT.

